CN214271596U - Cement concrete pavement flatness monitoring structure based on acceleration array - Google Patents
Cement concrete pavement flatness monitoring structure based on acceleration array Download PDFInfo
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Abstract
The utility model relates to a road engineering field especially relates to a cement concrete pavement roughness monitoring structure based on acceleration array. The utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array, a serial communication port, including the pavement body, the pavement body includes surface course, basic unit and is located the pavement joint-cutting on surface course surface, at least part pavement joint-cutting below is equipped with a plurality of acceleration detection device, a plurality of acceleration detection device are 5 ~ 10cm at the juncture evenly distributed of surface course and basic unit, and the interval of the vertical face that acceleration detection device and pavement joint-cutting correspond. The utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array can in time detect because the track structural problem that this kind of pavement roughness change probably brought and the potential safety hazard that produces play and prevent suffering from in the effect in the bud.
Description
Technical Field
The utility model relates to a road engineering field especially relates to a cement concrete pavement roughness monitoring structure based on acceleration array.
Background
With the development of highway and airport construction in China, the construction scale is continuously enlarged, and the requirement on the highway (runway) is continuously improved. The flatness of the road (road) surface is very important for the normal operation of the runway, and along with the increase of the operation time, the road (road) surface can be gradually deformed due to repeated load, so that the flatness is reduced, the reduction of the flatness of the road (road) surface can cause jolt in the driving process, the driving stability is influenced, and the serious threat can be brought to the operation safety of the road (road) surface. The conventional road (road) surface detection method mainly comprises a fixed-length ruler method, a section drawing method, a smooth accumulation method and the like, and although the latter two methods greatly reduce the workload compared with the former method, the flatness of the road (road) surface at a certain moment is measured by the conventional methods, the change condition of the flatness of the road (road) surface along with time cannot be obtained, and the road (road) surface maintenance is difficult to perform the functions of early warning and prompting.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a cement concrete pavement flatness monitoring structure based on acceleration array, which is used for solving the problems in the prior art.
In order to realize above-mentioned purpose and other relevant purposes, the utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array, including the pavement body, the pavement body includes surface course, basic unit and is located the pavement joint-cutting on surface course surface, at least part pavement joint-cutting below is equipped with a plurality of acceleration detection device, a plurality of acceleration detection device are 5 ~ 10cm at the juncture evenly distributed of surface course and basic unit, and the interval of the vertical face that acceleration detection device and pavement joint-cutting correspond.
In some embodiments of the present invention, the thickness of the surface layer is 30 to 35 cm.
In some embodiments of the present invention, the thickness of the base layer is 20 to 25 cm.
In some embodiments of the present invention, the extending direction of the pavement joint-cutting matches with the extending direction of the pavement body.
The utility model discloses an among some embodiments, the vertical setting of road surface joint-cutting, and the angle between the extending direction of road surface joint-cutting and the extending direction of road surface body is 85 ~ 90.
In some embodiments of the present invention, a line formed by the acceleration detecting device below the single pavement joint-cutting is parallel to a vertical surface corresponding to the pavement joint-cutting.
In some embodiments of the present invention, the acceleration detecting device is close to one side of the pavement joint cutting surface facing the vehicle traveling direction.
The utility model discloses an in some embodiments, single road surface joint-cutting below is equipped with three or more acceleration detection device, wherein, including the central detection device who distributes at road surface body center and the side detection device who distributes in road surface body both sides.
The utility model discloses an among some embodiments, the interval of side detection device apart from road surface body side is 40 ~ 60 cm.
In some embodiments of the present invention, the acceleration detecting device includes a detecting portion and a fixing portion, the detecting portion is located in the surface layer, and the fixing portion is located in the base layer.
Drawings
Fig. 1 shows that the utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array overlooks the schematic structure view.
Fig. 2 shows that the utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array looks sideways at the schematic structure view.
Fig. 3 shows a schematic flow chart of the acceleration array-based cement concrete pavement flatness monitoring method provided by the present invention.
Description of the element reference numerals
1 road surface body
11 surface layer
12 base layer
13 road surface cutting seam
2 acceleration detection device
21 center detection device
22 side edge detection device
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention will be further described in detail with reference to the following embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the disclosure of the present specification.
The utility model discloses the inventor provides a cement concrete pavement roughness monitoring structure and method based on acceleration array through a large amount of practical studies, and above-mentioned monitoring structure and method can in time feed back pavement roughness change law, and have simple to operate, measured data stability is high, can characteristics such as real-time feedback, has accomplished on this basis the utility model discloses the improvement is simple in structure, convenient to operate, measurement data stability is high.
The utility model discloses the first aspect provides a cement concrete pavement roughness monitoring structure based on acceleration array, as shown in figure 1, figure 2, including pavement body 1, pavement body 1 includes surface course 11, basic unit 12 and is located 11 surperficial pavement joint-cuts 13 of surface course, at least part pavement joint-cuts 13 below is equipped with a plurality of acceleration detection device 2, a plurality of acceleration detection device 2 have certain interval usually between the vertical face that junction evenly distributed, and acceleration detection device 2 and pavement joint-cuts 13 of surface course 11 and basic unit 12 correspond. In the above-mentioned cement concrete pavement evenness monitoring structure based on acceleration array, acceleration detection device 2 buries in the inside suitable position of pavement (for example, concrete pavement (road) face) with specific mode underground, and data acquisition through detection device to can be with data transmission to the computer terminal that gathers the acquisition, can learn the dynamic change law of pavement joint seam department roughness after further carrying out analysis processes to data, thereby learn the roughness result of pavement.
The utility model provides an among the cement concrete pavement roughness monitoring structure based on acceleration array, pavement body 1 can be the various cement concrete pavement in this field. For example, it may be an airport pavement, a highway pavement, or the like. The pavement body 1 may generally include, from top to bottom, a face layer 11, a base layer 12, and pavement cuts 13 on the face layer 11. In the pavement body 1, the face layer 11 generally functions to directly bear the traffic load and the external environment, and to provide a comfortable and safe driving surface for the vehicle. The material of the surface layer 11 can be plain concrete, prestressed concrete, steel fiber concrete, etc., and the thickness of the surface layer 11 can be 30-35 cm, 30-31 cm, 31-32 cm, 32-33 cm, 33-34 cm, or 34-35 cm. In the pavement body 1, the base layer 12 generally functions to take up vertical forces that diffuse down the pavement and further diffuse and transmit them to the underlying structural layers. The base layer can be made of roller compacted concrete, inorganic binder stabilizing materials, crushed (gravel) stone mixture and the like, and the thickness of the base layer can be 20-25 cm. Generally speaking, the pavement joint-cutting 13 is vertically disposed (i.e. downwardly disposed along the gravity direction), and the depth of the pavement joint-cutting is usually 4-6 cm, 4-4.5 cm, 4.5-5 cm, 5-5.5 cm, or 5.5-6 cm. The pavement joint-cutting 13 generally extends along the surface of the surface layer 11, and the extending direction thereof generally matches with the extending direction of the pavement body 1, for example, the angle between the extending direction of the pavement joint-cutting 13 and the extending direction of the pavement body 1 may be 85 to 90 °, 85 to 86 °, 86 to 87 °, 87 to 88 °, 88 to 89 °, or 89 to 90 °.
The utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array, acceleration detection device 2 mainly used gathers the vibration acceleration situation of change of carrier pavement joint-cutting department when the pavement. Suitable instruments that can be used as acceleration detection means 2 should be known to the person skilled in the art and can be, for example, optical MEMS acceleration sensors. As another example, the acceleration detection device 2 is typically in signal connection with an external device (e.g., a computer, etc.) to collect data acquired thereby.
The utility model provides a cement concrete pavement roughness monitoring structures based on acceleration array, at least partial pavement joint-cutting 13 below is equipped with a plurality of acceleration detection device 2, nevertheless acceleration detection device 2 does not lie in pavement joint-cutting 13 under, but need cooperate with the vertical face that pavement joint-cutting 13 corresponds (the plane that pavement joint-cutting 13 formed according to the direction of gravity extension promptly), need have suitable interval with the vertical face that pavement joint-cutting 13 corresponds promptly. For example, the distance between the acceleration detection device 2 and the vertical surface corresponding to the road surface joint-cutting 13 may be 5-10 cm, 5-6 cm, 6-7 cm, 7-8 cm, 8-9 cm, or 9-10 cm. For another example, a connection line formed by the acceleration detection devices 2 below the single road surface slit 13 is parallel to the vertical surface corresponding to the road surface slit 13. As described above, the acceleration detection devices 2 are generally uniformly distributed at the boundary between the surface layer 11 and the base layer 12, so that the change rule of the flatness of the surface can be accurately fed back as a whole. For example, three or more acceleration detecting devices 2 may be disposed below a single pavement slit 13, wherein a center detecting device 21 distributed in the center of the pavement body 1 and side detecting devices 22 distributed on both sides of the pavement body 1 may be included. For another example, the side edge detection device 22 usually has a suitable distance from the side surface of the pavement body 1, and the distance between the side edge detection device 22 and the side surface of the pavement body 1 may be 40-60 cm, 40-45 cm, 45-50 cm, 50-55 cm, or 55-60 cm.
The utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array, acceleration detection device 2 is located the pavement joint-cutting 13 towards the one side in the carrier direction of travel (promptly, the direction of advance) usually of being close to for the accurate carrier of catching contacts next a board in the twinkling of an eye pavement acceleration behind the joint-cutting. The acceleration detection device 2 is usually located at least partially in the surface layer 11 and at least partially in the base layer 12, and generally, the acceleration detection device 2 includes a detection portion and a fixing portion, the fixing portion mainly includes components such as a base and a bracket of the detection device, the fixing portion is mainly located in the base layer 12 to facilitate mounting of the base of the detection device, the detection portion is a main body portion of the detection device (i.e., a portion actually used for detecting vibration acceleration), the detection portion is mainly located in the surface layer 11, and the detection portion is mainly located in the surface layer 11 to enable detection of changes in vibration acceleration of the road surface.
The utility model discloses the second aspect provides the utility model discloses the cement concrete pavement roughness monitoring structure's that the first aspect provided construction method is knowing above-mentioned cement concrete pavement roughness monitoring structure's based on the acceleration array prerequisite under, and the method of the above-mentioned monitoring structure of suitable construction should be known to the technical personnel in the field. For example, the acceleration detection device 2 may be embedded at the boundary between the surface course and the base course of the road surface, the lower half of which is embedded and fixed in the base course, and the upper half of which is completely embedded in the surface course during the surface course construction.
The utility model discloses the third aspect provides a cement concrete pavement roughness monitoring method based on acceleration array, through the utility model discloses the cement concrete pavement roughness monitoring structure based on acceleration array that the first aspect provided monitors the pavement roughness, include: and acquiring the flatness data of the road surface according to the acceleration monitoring result provided by the acceleration detection device 2.
The utility model provides an among the cement concrete pavement roughness monitoring method based on acceleration array, as shown in FIG. 3, can include: the amount of longitudinal displacement h at the acceleration detection device per unit load is provided according to the following formula, which may be in mm/kg:
A＝x1aA+x2aB1+x3aB2
wherein A is the average acceleration of the road surface and the unit is m/s2；
aAAs the monitoring result of the central detection device, in m/s2；
aB1、aB2Respectively the monitoring results of two side detection devices, and the unit is m/s2；
x1、x2、x3Acceleration reduction coefficients, x, of the positions of the center detection device and the two side detection devices, respectively1Can be 0.2 to 0.3, 0.2 to 0.22, 0.22 to 0.24, 0.24 to 0.26, 0.26 to 0.28, or 0.28 to 0.3, x2Can be 0.4 to 0.6, 0.4 to 0.42, 0.42 to 0.44, 0.44 to 0.46, 0.46 to 0.48, 0.48 to 0.49, 0.49 to 0.5, 0.5 to 0.51, 0.51 to 0.52, 0.52 to 0.54, 0.54 to 0.56, 0.56 to 0.58, or 0.58 to 0.6, x3Can be 0.2-0.3, 0.2-0.22, 0.22-0.24, 0.24-0.26, 0.26-0.28, or 0.28-0.3. in an embodiment of the present invention, x is1＝0.25， x2＝0.5，x3＝0.25；
h is the longitudinal displacement of the acceleration detection device under unit load, and the unit is mm/kg;
n is a carrier speed reduction factor, and,
when the traveling speed v of the carrier (the traveling speed of the carrier in the extending direction of the road surface) is less than or equal to 50km/h, n may be 0.95-1.05, 0.95-0.97, 0.97-0.99, 0.99-1.01, 1.01-1.03, or 1.03-1.05, in an embodiment of the present invention, n is 1.0;
when the traveling speed of the carrier is 50km/h < v < 150km/h, n can be 1.15-1.25, 1.15-1.17, 1.17-1.19, 1.19-1.21, 1.21-1.23, or 1.23-1.25, in an embodiment of the present invention, n is 1.2;
when the traveling speed of the carrier is 150km/h < v < 250km/h, n can be 1.45-1.55, 1.45-1.47, 1.47-1.49, 1.49-1.51, 1.51-1.53, or 1.53-1.55, in an embodiment of the present invention, n is 1.5;
when the traveling speed of the carrier is 250km/h < v < 300km/h, n can be 1.95-2.05, 1.95-1.97, 1.97-1.99, 1.99-2.01, 2.01-2.03, or 2.03-2.05, in an embodiment of the present invention, n is 2.0;
g is the mass of the carrier, and the unit is kg;
in the above formula, aA、aB1、aB2The acceleration monitoring results provided by the acceleration detection device 2 can be used to further calculate and obtain the required longitudinal displacement h of the acceleration detection device under the unit load.
The utility model provides an among the cement concrete pavement roughness monitoring method based on acceleration array, can also include: and according to the longitudinal displacement H of the acceleration detection device under the unit load, providing a flatness evaluation index H, wherein H is the maximum value of H. In the actual detection process, when the carrier is gradually close to the pavement kerf, the acceleration detection device 2 can acquire the acceleration information of the position of the acceleration detection device 2 in the whole process, the variation trend of the longitudinal displacement H in the whole process can be obtained through calculation, and the flatness evaluation index H can be further acquired.
The utility model provides an among the cement concrete pavement roughness monitoring method based on acceleration array, can also include: and providing a road surface flatness result according to the flatness evaluation index H. Generally, the lower the flatness evaluation index H, the better the flatness of the road surface, and the higher the flatness evaluation index H, the worse the flatness of the road surface. For example, when H < 1X 10-5When mm/kg, the flatness of the road surface is considered to be good, and when 1X 10-5mm/kg≤H＜2×10-5When mm/kg, the flatness of the road surface is considered to be general, and 2X 10-5mm/kg≤H＜4×10-5When mm/kg, the flatness of the road surface is considered to be poor, and when H > 4X 10- 5In mm/kg, the problem of the flatness of the road surface is considered to be serious.
The utility model discloses the fourth aspect provides a computer readable storage medium, its upper storage has computer program, the program is realized when being executed by the treater the utility model discloses the cement concrete pavement roughness monitoring method based on acceleration array that the third aspect provided.
The utility model discloses a fifth aspect provides an equipment, include: a processor and a memory, wherein the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory, so that the equipment executes the steps of the acceleration array-based cement concrete pavement flatness monitoring method provided by the third aspect of the invention.
The utility model provides a cement concrete pavement roughness monitoring structure and method based on acceleration array provides a direct feasible method for the dynamic change who detects the pavement roughness to can study the dynamic change law of pavement roughness along with time on this basis, thereby can in time detect because the track structural problem that this kind of pavement roughness change probably brought and the potential safety hazard that produces, play and prevent suffering from in the effect in advance. In addition, above-mentioned monitoring structure is laid inside the road surface on the whole for to the detection of road surface roughness can go on under the condition that does not influence the road surface operation, thereby improve the operating efficiency of road surface greatly, have good industrialization prospect.
The following examples further illustrate the invention of the present application, but do not limit the scope of the present application.
Example 1
According to a concrete pavement (road) surface plate construction drawing, marking the position of a cutting line corresponding to the cutting of a surface plate on a base layer, and determining the midpoint of the cutting line of a monitored area. At the midpoint of the tangent line, at the positions 50cm away from the end of the tangent line on both sidesLabeled as deployment position A, B of acceleration detection device1、B2，A、B1、B2The distance between the cutting joint and the cutting joint is 5 cm.
Adopting inorganic binder stable material as material of concrete pavement base course, the construction thickness is 20cm, after the concrete pavement base course construction and maintenance are completed, arranging according to preset mounting position bolt holes of acceleration detection device, adopting drilling machine to make them be positioned in position A and position B1And position B2And punching holes and installing expansion bolts, and reinforcing the peripheries of the expansion bolts by using plain cement paste.
Position A, position B1And position B2An acceleration detection device (optical MEMS acceleration sensor, BA-MA10, sampling frequency)>1000MHz, measuring range 10g) is arranged on the base layer through expansion bolts. And the mounting heights of the three displacement meters are ensured to be the same during mounting so as to ensure the consistency of three data testing environments. And then, adopting the steel fiber concrete pavement as a pouring form of a surface layer of the concrete pavement (road), wherein the construction thickness is 30cm, the width of the joint seam is 6mm, the depth is 5cm, and the surface layer concrete is poured to ensure that the testing end of the upper half part of the acceleration detection device is completely wrapped in the surface layer concrete.
The data of the acceleration detection device is transmitted to the computer terminal through the data line for data storage, and the power supply adopts the solar energy system for power supply, so that all-weather automatic data acquisition is realized.
And processing and analyzing the data acquired by the acceleration detection device by using data analysis software so as to obtain the flatness data of the concrete pavement (road).
The data processing process is as follows:
A＝x1aA+x2aB1+x3aB2
wherein: a-average acceleration (m/s) of road (road) surface2)；
aA-monitoring result (m/s) of acceleration detection means at position A2)；
aB1-position B1Monitoring result (m/s) of acceleration detecting device2)；
aB2-position B2Monitoring result (m/s) of acceleration detecting device2)；
x1，x2，x3-positions A, B1，B2Acceleration reduction coefficient of (x)1＝0.25，x2＝0.5，x3＝0.25；
h is the longitudinal displacement (mm/kg) of the acceleration detection device under unit load;
n-the carrier speed reduction factor, and,
n＝1.0 v≤50km/h；
n＝1.2 50km/h<v≤150km/h；
n＝1.5 150km/h<v≤250km/h；
n＝2.0 250km/h<v≤300km/h；
g-vehicle mass (kg);
driving a Jianghuai pickup (MC1022C, 2425kg) to drive through a test road section along the road center line at a speed of 90km/H from the driving direction of the vehicle shown in the figure, recording the H value of the vehicle in the whole process of driving through the kerf from far to near, wherein the maximum value is the road surface flatness evaluation index H at the kerf, and evaluating the road (road) surface flatness according to the following standard.
TABLE 1 evaluation Standard of flatness of road (road) surface
| Road (road) surface flatness evaluation index H (mm/kg) | Flatness of road (or road) surface |
| H<1×10-5 | Good effect |
| 1×10-5<H<2×10-5 | In general |
| 2×10-5<H<4×10-5 | Is poor |
| H>4×10-5 | Severe severity of disease |
The table of the access records of the acceleration detecting device is shown in table 2, the other documents (S0401-D1-04-001 for example) refer to the steady operation state of the acceleration detecting device, and the other documents refer to the response of the acceleration detecting device to the impact state.
Table 2 accelerative speed detector access record table
| Acceleration detection device position number | Device access channel number | Laying position |
| S0401-D1-04-001 | 1 | A |
| S0402-D1-04-002 | 2 | B1 |
| S0403-D1-04-003 | 3 | B2 |
The data measured by the acceleration detector is substituted into the formula for calculation to obtain the evaluation index H of the road surface flatness of 4.7 multiplied by 10-6mm/kg, and the conclusion is that the flatness of the measured road (road) surface is good and is consistent with the actual situation.
To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a cement concrete pavement roughness monitoring structure based on acceleration array, its characterized in that, includes pavement body (1), pavement body (1) is including surface course (11), basic unit (12) and be located pavement kerf (13) on surface course (11) surface, at least partly pavement kerf (13) below is equipped with a plurality of acceleration detection device (2), a plurality of acceleration detection device (2) are at the juncture evenly distributed of surface course (11) and basic unit (12), and acceleration detection device (2) and the interval of the vertical face that pavement kerf (13) correspond are 5 ~ 10 cm.
2. The acceleration array-based cement concrete pavement flatness monitoring structure of claim 1, wherein the thickness of said surface layer (11) is 30-35 cm.
3. The acceleration array-based cement concrete pavement flatness monitoring structure of claim 1, wherein the thickness of the base layer (12) is 20-25 cm.
4. An acceleration array based cement concrete pavement flatness monitoring structure as claimed in claim 1, characterized in that the extension direction of said pavement slit (13) is matched with the extension direction of the pavement body (1).
5. The acceleration array-based cement concrete pavement flatness monitoring structure according to claim 4, wherein the pavement cuts (13) are vertically arranged, and an angle between an extending direction of the pavement cuts (13) and an extending direction of the pavement body (1) is 85-90 °.
6. An acceleration array-based cement concrete pavement flatness monitoring structure as claimed in claim 1, characterized in that the connection line formed by the acceleration detecting means (2) under the individual pavement slits (13) is parallel to the vertical plane corresponding to the pavement slits (13).
7. An acceleration array-based cement concrete pavement flatness monitoring structure as claimed in claim 1, characterized in that said acceleration detecting means (2) is near the side of the pavement slit (13) facing the vehicle traveling direction.
8. An acceleration array-based cement concrete pavement flatness monitoring structure as claimed in claim 1, characterized in that more than three acceleration detecting devices (2) are arranged below a single pavement kerf (13), wherein, the acceleration detecting devices comprise a central detecting device (21) distributed in the center of the pavement body (1) and side detecting devices (22) distributed on both sides of the pavement body (1).
9. The acceleration array-based cement concrete pavement flatness monitoring structure according to claim 8, wherein the distance between the side edge detection device (22) and the side surface of the pavement body (1) is 40-60 cm.
10. An acceleration array-based cement concrete pavement flatness monitoring structure according to claim 1, characterized in that said acceleration detection means (2) comprises a detection portion and a fixing portion, said detection portion being located in the surface layer (11) and said fixing portion being located in the base layer (12).
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